File "E:\jiveroot\mathcol\code\jvmc\locable.py", line 106, in getPos
    return self._root.getPos(base.render)
AssertionError: !is_empty() at line 1834 of panda/src/pgraph/nodePath.cxx
:task(error): Exception occurred in PythonTask jive-task
Traceback (most recent call last):
  File "run-locally.py", line 6, in <module>
    execfile('run.py')
  File "run.py", line 31, in <module>
    app.run()
  File "C:\Program Files (x86)\Panda3D-1.7.2\direct\showbase\ShowBase.py", line 2630, in run
    self.taskMgr.run()
  File "C:\Program Files (x86)\Panda3D-1.7.2\direct\task\Task.py", line 502, in run
    self.step()
  File "C:\Program Files (x86)\Panda3D-1.7.2\direct\task\Task.py", line 460, in step
    self.mgr.poll()
  File "../../jiveutils\jiveutils\base.py", line 705, in _taskFunc
    res = self.func(dt)
  File "E:\jiveroot\mathcol\code\jvmc\main.py", line 202, in update
    self.gameStates.update(dt)
  File "../../jiveutils\jiveutils\fsm.py", line 159, in update
    res = self.updateFunc(dt)
  File "E:\jiveroot\mathcol\code\jvmc\game_screen.py", line 331, in update
    self._updateComponents(dt)
  File "E:\jiveroot\mathcol\code\jvmc\game_screen.py", line 284, in _updateComponents
    Moveable.update(dt)
  File "E:\jiveroot\mathcol\code\jvmc\components.py", line 46, in update
    if it.isMoving() and not it._updateMoveTo(dt):
  File "E:\jiveroot\mathcol\code\jvmc\components.py", line 74, in _updateMoveTo
    direction = self._moveTarget.getPos() - self.getPos()
  File "E:\jiveroot\mathcol\code\jvmc\locable.py", line 106, in getPos
    return self._root.getPos(base.render)
AssertionError: !is_empty() at line 1834 of panda/src/pgraph/nodePath.cxx